---
title: "Thirdbase Opportunity LP - Series ER III SEC filings"
url: https://altstreet.investments/edgar/2141734
kind: edgar-entity
publisher: AltStreet (https://altstreet.investments)
license: Public factual pages may be read, quoted and cited with attribution and a link. Bulk redistribution is not permitted.
---

# Thirdbase Opportunity LP - Series ER III: SEC filings and what they report

| Field | Value |
| --- | --- |
| Entity | Thirdbase Opportunity LP - Series ER III |
| CIK | 2141734 |
| Filing family | Form D |
| Total offering amount (as filed) | $31,000,000 |
| Total sold (as reported) | $31,000,000 |
| Investors (as reported) | 3 |

## Filings (1 on record, newest first)

| Date | Form | Family | SEC link |
| --- | --- | --- | --- |
| June 23, 2026 | D | Form D | https://www.sec.gov/Archives/edgar/data/2141734/000214173426000001/ |


## More

- Entity page (HTML, with events, parties and the platform record): https://altstreet.investments/edgar/2141734
- SEC EDGAR filing index: https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0002141734&owner=include&count=40
- Signal history, evidence passages and the entity graph are AltStreet Terminal features: https://altstreet.investments/terminal

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Source page: https://altstreet.investments/edgar/2141734
Machine index: https://altstreet.investments/llms.txt
AltStreet reads what platforms, funds and issuers file with the SEC and what they tell investors, and publishes the difference. Figures are as filed or as captured on the date stated; nothing here is investment advice.